Another "if these dogs bred" question?

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I have a rhodesian ridgeback cross who could pass as pure ridgeback, including the ridge, so I know it can be passed in a crossbreeding.

I'm curious about whether the ridge requires the ridgeback coat (short haired single coat in wheaten or red wheaten), or whether you could possibly produce pups with, for example, the true labrador double coat in black, chocolate and yellow, with the addition of a ridge.

It's my dream to produce a ridgebacked dachshund.  I know it's sheer folly, that's why it's a dream, but ya gotta admit, it would be pretty cool.

Chix · Accepted Answer

I did a quick google on Ridgeback genetics and found this (below).

Why not email the author- she was doing a test breeding of her ridge-less females to sires that been proven to never fail to produce ridged puppies.

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Quote:  As a scientist, I do not think the ridge genetics are simple Mendelian genetics, which is the way “the ridge gene” has been understood by most people.   Saying the dog is RR, Rr, or rr does not explain short ridges, comma ridges, or multi-crowned ridges.  Therefore, the great genetics experiment has begun.

"“The ridge in both Rhodesian Ridgebacks and Thai Ridgebacks is caused by a
mutation on chromosome 18 in which a stretch of the DNA that is 133,400 nucleotides
long has become duplicated. This duplicated segment of chromosome 18 has been called the “ridge gene”, but the duplicated segment includes four known genes and part of a fifth. It is presumably the presence of multiple copies of one or more of these genes that is responsible for formation of the ridge during embryonic development, by a mechanism so far not known.”
 
When you have multiple loci involved in the phenotypic expression of the ridge, inheritance cannot be as simple as has been implied.  There is no DNA test that can distinguish so-called homozygous dominant from hetereozygous.  In other words, by looking at a dog with a ridge, you do not know if the dog can produce ridgeless if mated to another dog or not.

http://www.rhodesian-ridgeback-pedigree.org/articles-informations/breeding-and-genetics/the-big-genetics-experiment.html
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There were a line of Dobermans with a cowlick - sired from a dog called Dictator - it appeared 10 generations later and it became known as "the mark of the Dictator".  Would this be classified as a short ridge?  Maybe?  Anyway,  based on the above genetic explanation it makes sense.

I admire the Rhodesians - and think a ridge on a Doberman would be cool.  Or even a Boxer, or Viszla.  A Dachshund - that long body with a ridge ...well, its interesting.

YODEL · Answer

Thai Ridgebacks can be any of several different colors & still display the ridge.  It's the same genetic mutation that the Rhodesian has....so apparently not linked to color in any way.  

LOL and I wasn't sure about the coat type thing, so I googled around a bit because it got me curious too (and I'm bored)....and I found this:
http://www.dogbreedinfo.com/c/cambodianrazorbackdog.htm

Not sure if this is exactly an answer to your question, since this isn't a true Lab coat.....but either way, finding this made my night.  Dogs with mohawks.  I've found the canine punk rock gene.  LOL.

If you ever produced a mohawked Dachshund (longhair with a ridge, lol).....THAT might be the one possible exception that would have me abandoning my dog-related ethics & morals.  I would likely be first in line with a wad of cash to buy the world's most punk rock designer mutt.  I'm far too easily amused by certain things, and picturing it in my mind, this would definitely have me amused to no end.  LOL.

Rayven ~ SCAdian girl · Answer

Nope it wouldn't be pretty cool

The gene for the ridge is autosomal dominant  which means only parent has to carry for it so yes it can be passed on.

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Another "if these dogs bred" question?

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